When I enter Time Machine I have only black windows
I can't see any of my backups - just black windows. It has regularly been running the backups, seemingly with no problem, no error messages. But when I enter Time Machine - only black windows. THe light on the Time Capsule shows green. I tried unplugging it, letting it rest for awhile, plugging it back in again. I've tried turning Time Machine off and back on again. Tried restarting the computer. No dice. (I have a clone of my hard drive, so it's not a disaster.)
I will be grateful for help.